Broad-barred Knot-horn vs St. James' shell

Acrobasis consociella compared with Pecten maximus

Taxonomic Classification

Rank	Broad-barred Knot-horn	St. James' shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Lepidoptera (Butterflies & Moths)	Pectinida (Pectinida)
Family	Pyralidae	Pectinidae
Genus	Acrobasis	Pecten
Species	Acrobasis consociella	Pecten maximus

Evolutionary Relationship

Broad-barred Knot-horn and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Broad-barred Knot-horn

LC — Least Concern

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Broad-barred Knot-horn	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Broad-barred Knot-horn

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

St. James' shell

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (China), Europe (8 countries), and South America (Chile).

Broad-barred Knot-horn

The Broad-barred Knot-horn (Acrobasis consociella) is a species in the genus Acrobasis. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

St. James' shell

St. James' shell (Pecten maximus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden